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Journal of Applied Mathematics and Statistical Applications | Volume: 1
August 23-24, 2018 | London, UK
Applied Physics
3rd International Conference on
Developing terahertz radiation sources for particle acceleration: A route to future
table-top accelerators
Darren Graham
University of Manchester, UK
Radio-frequency (RF) accelerating cavities used in current
particle accelerators are limited to accelerating gradients
of 100MVm-1. To achieve the desired increase in acceleration
gradient for future particle accelerators while enabling a
reduction in the size and cost requires a fundamentally new
approach. Free-space acceleration with ultrafast laser driven
terahertz radiation sources offers a promising alternative.
Such terahertz radiation sources can provide electromagnetic
pulses with electric field strengths in excess of 100 MVm-
1 and they have an oscillation period which matches
the particle bunch lengths produced in RF accelerators.
The challenge in using freely propagating electromagnetic
radiationforparticleaccelerationis inmaximisingthe interaction
length between the radiation and the particle beam. The phase
slippage of the radiation with respect to the particle bunch
velocity, v, can limit the effective interaction length as v < c. In
comparison to using optical frequencies, the use of terahertz
frequency radiation is attractive because the particle bunches
and radiation pulses can remain in phase over longer distances.
In this talk I will present our work on developing ultrafast laser-
driven terahertz radiation sources suitable for the acceleration
of charged particles and our work in realizing a proof-of-
principle terahertz acceleration experiment. This will include
a discussion of our work on developing sources which can
produce radiation with a novel polarization state aligned along
the directionof beampropagation andourmore recent work on
developing a terahertz source with a sub-luminal phase velocity
that can be tuned to match the velocity of a particle beam.
Speaker Biography
Darren Graham is a lecturer in the School of Physics and Astronomy at the University of
Manchester. He uses ultrafast laser-based THz techniques to develop novel THz frequency
radiation sources and exploits THz radiation to manipulate particle beams. He has
published over 35 papers, with 833 citations and has a h-index of 13. He has held several
international collaborative grants with researchers in Japan, Germany, and Ireland, and sits
on the committee of the Institute of Physics Quantum Electronics and Photonics group.
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